StarTech Model ICUSB2321X Professional USB to RS-232 Serial Adapter Type: USB to DB9 (RS-232) Type: Cable Connectors Color: Black Connector Number: 2 Connector Detail: Connector Types 1 - USB A Female Connector Types 1 - DB9 Male Specifications: OS Support : 32-bit Windows Vista, XP, 2000, Server 2000 and 2003. Limited functionality with Windows NT 4 and 64-bit systems (64-bit driver available in Downloads section) Maximum Data Transfer Rate : 230 Kbps Compatibility : Supports USB 1.1 and above Electrical Outlet Plug Type: Plug Type “A� (USA, Canada, Mexico, Japan)